Type-matrix-side-grooving machine.



J. s. BA-NCROFTKQ M. OQIND AHL. TYPE MATRIX SIDE enoovme MACHINE.

PtentedJan. 10, 1911[ 15 sums-sum 1.

APPLICATION FILED APR-1B, 1909.

J. S. BANGROPTKL M. U. INDAHL. TYPE MATRIX sum enoovme MAGHINE.

APPLIQATIOE FILED APRJG, 1909. v I

' Patented Jan, 10,- 1911.

15 snnt'rs-snnn'T 2.

1m: NORRIS PETER; co., WASHINGTON, n. c

J. S. BANGROFT MI 0. INDAHL.

TYPE MATRIX SIDE GROOVING MACHINE.

-,awrmouxon FILED APR. 16, 1909.

Patented 'Jan. 10,. 1911.

15 SHEETS-SHEET s. 1, 5

' H I. W I if r v a: y g u v 779 72] If] I i 3 5 .1 l iv! a 7]] l i :H If 19? 1 753 I @2 i= 961 70a 73,? I Ll 730 P {l l" l L 732 M1 will" momTHE NORRIS PETERS co...wAsHmarcu, B. c.

woeuhoes sa I I J. s. BANGROFT & M. c. I NDAHL, TYPE MATRIX SIDEGBOOVING MACHINE.

APPLICATION FILED A-PR. 16, 1909.

Patented Jam 10, 1911.

' 15 sums-gami- 4.

Eluozntozs J. s BANGR'OFT & 11.0. INDAHL.

TYPE MATRIX SIDE GROOVING MACHINE.

APPLICATION FILED APR. 16, 1909. 980,903. Patented Jan. 10,1911.

15 SHEETS-SHEET 5.

m aw

-J-' S-Baawrafi' M- c'lzzlalakl.

rm: NORRIS PETE 1. WASHINGTON, a. c,

J. s BANCROFT & M. c; INDAHL.

TYPE' MATRIX SIDE GB'OOVING MACHINE.

APPLICATION IIL'ED'APEJ 16, 1909.

Patented Jam 10,1911",

J g "H A mygi mmm mm wm Wibxwooaa J S BANGROPT & M G INDAHL TYPE MATRIXSIDE GROOVING MAGHINE. APPLICATION FILED APE.16,1909. 9 0,903, Patented13.11.10, 1911.

15 SHEETS-SHEET 7.

J. s. BANGROFT & M. d. VINDAHL.

TYPE MATRIX SIDE GROOVING MACHINE.

APPLICATION I'ILED'AIR. 16, 1909.

Patented J an. 10, 1911.

16 SHEETS-SHEET 8.

wuentors Ba/w'of. [India/I26 J. s. BANGROFT 65M. 0. INDAHL.

TYPE MATRIX SIDE GROOVING MACHINE.

APPLICATION FILED APR. 16 1909. 980,903.

Patented Jan. 10, 1911.

15 SHEETS-SHEET 9.

.. WASHINGTON, n. c.

J. s. 'BANGROFTjki-"M. 0. I'N'DAHL'. TYPE MATRIX SIDE I GROOVING MAOHINPAPPLIOATIONI'ILED APR. 16, 1909.

980,903. 7 Patented Jan. 10, 1911.

15 SHEETS-SHEET 10.

THE NORRIS PETERS co., WASHINGTON n. c.

' J. s. 131111011011" 1 M. 0111111111111 TYPE MATRIX SIDE GROOVINGMACHINE. 11221110111011 FILED APB.16, 1909.

980,903. Patented Jan. 10, 1911.

15 SHEETS-SHEET 11.

r": Mamas PETERS cm, wlshmamzv, D. c.

J S. BANGRO FT & MiG. INDAHL.

, TYPE MATRIX SIDE GROOVING MACHINE.

Arrmonxo n FILED APB.16, 1909.

Patented Jan. 10, 1911.

15 SHEETS-SHEET 12.

I IIIHIIIHIUIHIJH IHHTII amnutoz 5- J aamw'o t.

M: C law/ML I utter-wags J. $.BANGROFT & M. c.- INDAHL. TYPE MATRIX SIDEGBOOVING MACHINE.

APPLICATION FILED APR.16', 1909.

Patented Jan.10,1911.

16 SHEETS-SHEET 13.

fiaweL-M ozs' :Z 6'- Bazz croft M. a. 176M THE NqRRls PETERS cc"IAsmNcroN, n, c.

J. S. BANGROFT & M. G. INDAHL.

TYPE MATRIX SIDE GROOVING MACHINE. APPLICATION FILED APRJS, 1909.

Patented J an 10, 1911.

1a SHEETS-SHEET 14.

I. s. BANGROFT &;-M.-c. INDAHL; TYPE MATRIX SIDE GROOVING MACHINE.

Patented Jan 10,1911;

15 sums-sum 1'5.

ATEN

orrio.

JOHN SELLERS BANCROFT AND MAURITZ C. INDAHL, OF PHILADELPHIA, PENNSYL-VANIA, ASSIGNORS TO LANSTON MONOTYPE MACHINE COMPANY, OF PHILADEL- PHIA,PENNSYLVANIA, A CORPORATION OF VIRGINIA.

TYPE-MATRIX-SIDE-GROOVIN Gr MACHINE.

T 0 all whom it may concern:

Be it known that we, JOHN SELLERS BAN- onor'r and MAURITZ C. INDAHL, ofPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented a certain new and useful Improvement in TypehlatrixSide-Grooving Machines; and we do hereby declare the following tobe a full, clear, and exact description of the same, reference being hadto the accompanying drawings, forming a part of this specification, andto the figures and letters of reference marked thereon.

The invention relates generically to automatic milling or shapingmachines and is embodied in a machine specially designed toautomatically, expeditiously and accurately produce the suspension andalining grooves or slots in the sides of type mat-- rices such as areemployed in what is known as the cellular die case (Patent No. 7 8 1,245dated March 7, 1905).

The grooves on diametrically opposite sides of the matrix aresymmetrical and in parallel planes, intersecting the other pair ofgrooves at right angles, the two sets or pairs differing in width and,if required, in depth also, and in the process of manufacture the sidegrooving is usually performed after the matrix and conical centeringcavities have been formed in opposite ends of the block.

A very high degree of accuracy is demanded both in locating anddimensioning the grooves to the end that the matrices shall beinterchangeable and the characters retained in justified position in thedie case; and it is also required that distortion and mutilation of thematrix block should be guarded against, all of which objects areautomatically and expeditiously attained by the improvements hereinafterfully described and the novel features pointed out in the appendedclaims.

In the accompanying drawings illustrating a preferred form of embodimentof said invention: Figure 1 is a perspective view of the completemachine, the lower ends of the supporting legs being broken away andomit-ted. Fig. 2 is a top plan view Fig. 3 a front elevation and Fig. ata right end elevation of the machine. Fig. 5 is a vertical sectionthrough the blank posi- Specifieation of Letters Patent.

Application filed April 16, 1909.

Patented Jan. 10, 1911. Serial No. 490,229.

tioning and holding devices and the centering devices. Fig. 6 is a topplan view partly in section of those parts of the machine operatingimmediately upon the matrices including the feeding and deliveringdevices, the translating devices, the centering, gaging and rotaryclamping mechanism and milling cutters. Fig. 7 is a longitudinal sectionthrough the matrix centering and placing devices. Fig. 8 is a detailView showing a section of the matrix centering spindle and its bearing.Fig. 9 is a longitudinal section of the rotary matrix holder or chuckand gage. Fig. 10 is a similar view with the chuck open and gageadvanced to discharge the matrix. Fig. 11 is a. perspective View of thechuck rotating and locking devices. Fig. 12 is a front elevation of thegaging locking means. Fig. 13 is a section through the chuck spindle ina plane intermediate the pawl and its carrying pinion and looking to theright or toward the pawl controller. Fig. 14: is a similar view taken tothe right of the pawl and looking toward the pinion. Fig. 15 is a detailsection through a portion of the pinion pawl and the pawl controller.Fig. 16 is a face or end View of the rotary matrix chuck or clamp. Fig.17 is a transverse section through the chuck spindle in the plane of thepivot of its movable jaw. Fig. 18 is a similar view in the plane of theactuating pin. Fig. 19 is a vertical section in a plane to one side ofand parallel with the translating jaws. Fig. 20 is a detail view of aportion of the actuating devices for the translating jaws. Fig. 21 is atransverse vertical section through the translating mechanism. Fig. 22is a perspective view of the translating devices with the side plateremoved and the vertically reciprocating guide in section. Fig. 23 is aperspective view of the clamping aws of the translating devices withblank and finished matrices in position. Fig. 24 is a longitudinalsection through the bearing for the spindle of one of the millingcutters. Fig. 25 is a transverse section of the milling cutter spindleand its bearing showing the means for effecting the lateral adjustment.Figs. 26 to '31 inclusive are diagrammatic views illustrating thetranslating jaws, matrix and milling cutters in difierent positions.Fig.

3:2 is a perspective view of the finished matrix. Fig. 33 is aperspective view of the transfer devices at the exit of the supply andentrance to the receiving galley, the translating jaws and cover platesbeing omitted. Fig. 34 is a vertical section through the transferdevices of Fig. 33 in the plane of the transverse pusher together withthe translating jaws in position to receive and discharge the matrices.Fig. is a section on the line Fig. 34;. Fig. 36 is a perspective view ofthe block forming the discharge gate of the supply galley. Fig. 37 is asectional view corresponding with Fig. but with the pusher advanced todeposit the finished matrix in the receiving galley. Fig. 38 is aperspective view of the entrance to the receiving galley. Fig. 39 is adetail perspective of the transverse pusher. Fig. "10 is a similar viewof the pusher at the entrance to the receiving galley. Fig. il is a sideview of the cams and connections for the translating jaws. Fig. 42 is aside view of the cam and connections for the t"ansverse pusher. Fig. 43is a side view of the cam and connections for the guide of thetranslating Fig. 4 1 is a side view of the cam and connections for thecentering spindle. Fig. a5 is a side view of the cam and connections forthe locking bolt of the matrix chuck. Fig. 4G is a side view of the camand connections for the chuck actuating devices. Fig. at? is a side viewof the cam and connections for the chuck rotating devices. Fig. 48 aside view of the cam and connections for reciprocating the millingcutters.

Like letters of reference in the several figures indicate the sameparts.

I or purposes of description the machine illustrated may conveniently bedivided into its integrant parts as follows: the milling or groovingdevices; the blank or matrix po- ,=itioning and holding devices; thetranslating mechanism; the matrix supplying and receiving gallcys; themeans for transferring the n'iatric one at a time, from the supplygalley to the translating devices and from the latter to the receivinggalley; and the actuating devices for producing and controlling theaction of the several mechanisms.

The matrix blo :k prior to the side grooving is in the form of aparallelepiped in one end of which the matrix cavity has been formed andin the opposite end a central conical depression or seat for thereception of the centering pin of the type machine, and the machineabout to be described is specially designed to form the grooves 1, 2,Fig. 32, whereof the narrower parallel grooves 1 on opposite sides runinto and intersect the wider parallel grooves 2 on the remaining twosides.

The milling or grooving mechanism ineludes two rotary cutters 3, ofwhich the first corresponds in width with grooves 1 and the second withgrooves Each cutter is reinovably secured to one of two arbors 5, thelatter supported in parallel relation in hearings on a carriage 6movable verti'zally in guides upon the frame. Each of said arbors iseccentrically supported in a revo luble sleeve or hearing 7, the lattercarrying a worm wheel 8 engaged by a worm 9 supported in hearings oncarriage 6, whereby said sleeve may be turned to adjust the arbor andcutter laterally for varying the depth of the cut. The arbor 5 is heldagainst longitudinal displacement within sleeve 7 by being confinedbetween a collar and nut at opposite ends of said sleeve, and tl elatter is provided with adjusting devices, such as nuts 10, for varyingits longitudinal position.

To the rear end of each arbor 5 is attached one end of a flexible andextensible coupling 11 the opposite end whereof is connected to one of apair of shafts supported in hearings on the frame and each provided witha pulley 12 or equivalent driving mechanism. In the preferred formillustrated the pulleys 12 are driven in relatively opposite directionsby the driving belt 13, the latter passing first beneath the lowerpulley, thence up and around the upper pulley and down and around pulley14. By this arrangement both cutters are caused to reciprocate in thesame path from opposite ends thereof so as to alternately engage thematrix, the latter being accurately positioned by the holding devices,and, in the interval between successive applications of the cutters,turned about its axis through 90 to successively present adjacent sidesin the path traversed by one or the other of said cutters, as willpresently appear.

The matrix positioning and holding de vices include a clamp or chuck andan opposed centering device between which the matrix is supported inproper relation to the path of the cutter during the formation ofsuccessive grooves in its sides, and means for intermittingly rotatingsaid clamp or chuck, to present successive faces or sides of the matrixto the action of the cutters as will now be explained.

Supported in a hearing or bearings on the frame and provided withsuitable means for preventing longitudinal movement therein, is a hollowspindle or sleeve 16, the axis whereof is preferably in parallel withand to one side of those of the cutter carrying arbors 5. The end ofsleeve 16 adjacent the cutters is equipped with a removable head orplate 17 carrying two radial and independently adjustable jaws 18, theinner or adjacent ends whereof are disposed at a right angle. Opposingaws 18 is a movable jaw 19 provided with an angular seat 20 and carriedby a lever 21 pivotally supported and operating within sleeve 16, saidlever being furnished with an inclined groove or way 22 in which rides apin 23 carried by a rod 24 within said sleeve. This rod 24 ex tendsbeyond sleeve 16 and is engaged by a spring 25, the latter operating toretract said rod in a direction to advance jaw 19 toward the angularseat formed by jaws 18. Head 17 is also provided with a guide 26 for thereception of a longitudinally movable block 27 the latter attached to aslide 28 within sleeve 16 in position to be engaged by rod 24 when thelatter is advanced to retract jaw 19 and thus open the chuck. Block 27serves as a gage for determining the longitudinal position of the matrixrelative to the jaws of the chuck when inserted in the latter, and as anejector for the matrix when the jaws of the chuck are opened, to whichends the slide 28 to which said block is attached is free to move withinsleeve 16 between rod 24 and guide 26, the rearward movement beinglimited by the contact of block 27 with its guide so that when thematrix is inserted between the jaws of the chuck, block 27 will be movedback until arrested by its guide, thereby determining the position ofthe matrix, and when rod 24 is advanced to open the chuck, it willengage slide 28 and advance block 27 to eject the matrix from betweenthe jaws of the chuck.

Opposite the chuck and in axial alinement therewith are the centeringand matrix seating devices. These include a spindle 30 supported insuitable hearings on the frame and provided with a conical point adaptedto enter the cone hole in the base of the matrix. Surrounding thepointed end of spindle 30 is a pusher in the form of a disk or plate 31carried upon rods 32 lying in grooves in the periphery of said spindle,the rear ends of said rods being attached to a collar mounted upon thereduced rear end or portion of spindle 30.

The end of spindle 30 extends through a casing 34 attached to the frame,and the collar 33 is located within said casing, the lat ter limitingthe forward movement of the collar. To spindle 30 in rear of collar 33is adjustably secured a collar working in casing 34 and between saidcollars (33, 35) is interposed a spring 36. An actuating lever 37engages an adjustable collar 38 fast upon spindle 30, and a guard 39fast on the frame surrounds the conical point of spindle 30 when thelatter is retracted to permit the entrance of a matrix between the chuckand centering spindle, the function of said guard being to preventengagement of the matrix with the point of the spindle and consequentmutilation of either matrix or spindle. Then spindle 30 is retracted forthe admission of a matrix to the chuck, collar 33 is engaged by theshoulder at the junction of the main and reduced sections of saidspindle to withdraw plate 31 and the point of the spindle within guard39, as represented in Fig. 7. The matrix having been presented inposition between spindle 30 and the chuck, lever 37 is actuated toadvance said spindle, the point of the latter entering the cone hole inthe matrix, and plate 31 at the same time engaging the end of the matrixto force the latter into the chuck. During this movement the matrix issupported by its ends between the parallel faces of plate 31 and gageblock 27, the latter held to place by the friction of slide 28 andyielding to the pressure of the matrix until arrested by its guide,whereupon, by the continued movement of spindle 30, the conical point ofthe latter is seated in the cone hole. The matrix being thus properlypositioned, the movable jaw of the chuck is advanced to close the chuckand clamp the matrix, the spindle being maintained in its forward orcentering position while the cuts are being formed. Thus the preliminaryseating or centering of the matrix is performed by the spring actuatedplate 31 and gage 27 acting upon the relatively broad ends of the matrixbefore the conical spindle is seated to effect the final centering ofthe matrix and to afford support to the end of the latter remote fromthe clamping jaws of the chuck.

The mechanism whereby the chuck is intermittingly rotated and accuratelypositioned, to present successive sides of the matrix to the cutters, isapplied to sleeve 16 and in the preferred form of embodiment illustratedincludes a disk 40 provided with four equally spaced peripheral notches41, a locking bolt 42, a pinion 43 carrying an engaging pawl 44, a diskprovided with equally spaced peripheral notches 46, and means foractuating the pinion and controlling the engagement of its pawl withdisk 45. Disks 40 and 45 are fast on sleeve 16 while pinion 43 is freeto oscillate thereon and when advanced with its pawl 44 seated in one ofthe notches in disk 45 it carries the sleeve with it. Locking bolt 42,Fig. 12, is movable longitudinally between parallel bearings or ways onthe frame its engaging end or point being provided with oppositeconverging faces adapted to enter corresponding notches in disk 40.

To prevent accidental displacement of the chuck when locked in any ofits four positions of adjustment bolt 42 is constructed in two sections,the outer section having its rear portion reduced or cut away on oneside to form an incline 47 and shoulder 48. The rear section of saidbolt is provided with a tongue 49 one face whereof is inclined, as at50, to correspond with the incline 47 and provided with an overlappingor hook portion 51 beyond shoulder 48. The bearing on the frame facingincline serves as the gage or datum line for determining the position ofthe chuck when said bolt engages and is seated in notch 41, thearrangement and angle of inclines 47 and 50 being such that when therear section of the bolt is moved in a direction to withdraw theengaging section from the notch 41 its hook portion 51 will engageshoulder 48 after the inclines separate slightly to loosen the bolt inits bearings; and when the motion of the rear section is reversed toproject the bolt, the inclines will be reengaged to advance the frontsection, the two moving easily in their bearings until the engaging endis seated in notch 41 when by a continued pressure upon the rear sectionthe front or engaging section will be firmly clamped against one sidebearing, to wit, that one facing incline 59 and constituting the gagefor the final positioning of the chuck.

The means controlling the movement and engagement of pawl 44 include thefollowing devices: The )awl arm 53 carries a pin 54 and is providec witha toothed segment 55 concentric with its pivot 56 and gearing with asimilar segment 57 on an arm 58, the latter also pivoted to pinion 43and provided with a pin 59, the arrangement being such that arms 53 and58 will move in unison in the same direction so that pins 54 and 59 willstand equidistant from the axis of pinion 43 in all positions ofadjustment. Guided to reciprocate in bearings on the frame is a slide oryoke 60 provided with a curved way 61 to receive pins 54, one or theother whereof is at all times within said way. Pinion 43 is engaged by arack 62 movable in guides on the frame and operating at predeterminedintervals to oscillate said pinion back and forth. hen the pinionreaches one extreme of its movement, say the end of its feeding stroke,locking bolt 42 advances and is seated in notch 41, and way 61 iselevated and through its engagement with pin 59 causes the retraction orwithdrawal of pawl 44 indicated by the dotted lines in Fig. 13, and fulllines in Fig. 14) whereupon the pinion is rotated to the oppositeextreme, to retract pawl 44 and bring the latter opposite the next notchin disk 40. During this movement pin 59 of arm 58 passes from way 61,after pin 54 of arm 53 has entered therein, and said pin 54 is broughtto such a position that upon the movement of way 61 toward the axis ofpinion 43 pawl 44 will be seated in the notch 41 registering therewithwhere it will be positively held during the next succeeding advance ofpinion 43 by the engagement of said way with pins 54 and 59, thusproviding an intermitting feed in which the engaging pawl is positivelymoved and held in engagement with the driven member during its forwardor operating excursion and then positively withdrawn and held inretracted position, free of the driven member, during the return of thepawl to initial position.

During the partial rotation of the chuck, effected by the mechanismdescribed, the jaws remain closed but the pressure upon spindle 30 isslightly relaxed so as to permit free rotation of the matrix while stillsupporting the latter axially against displacement.

The completed matrix when delivered from the chuck is received by thetranslating devices, the latter having previously been charged with anungrooved matrix which it presents in position to be entered into thechuck through the action of plate 31 or spindle 30, after which thecompleted matrix is carried to a position where the transferring meansoperate to deliver an ungrooved matrix from the supply galley to saidtranslating devices, and to deliver the completed matrix to thereceiving galley, as will now be explained.

The translating devices include a frame 63, pivotally attached at itsrear end, as at (34, to a carriage 65, the latter reciprocating inhearings on the frame and provided with a housing 66 in which frame (33is guided in its movement upon. pivot 64, the arrangement being suchthat frame 63 is permitted a two way movement in a single plane. Anadjusting screw (37 limits the movement of frame (33 in one direction,and the movement 1 of carriage 65 is limited in one direction byengagement with a gaging abutment 68 and in the other by an adjustingscrew 69, the one for positioning the matrix holding devices relative tothe chuck and centering spindle and the other with relation to thematrix transfer devices or pusher.

Frame carries a fixed block 70' located intermediate two oppositelymovable levers 71, 72, each of the latter provided with a lip 73 andcooperating with a projection 74* on block 70 to form two pairs or setsof clamping jaws. To the rear end of each lever 71, 72. is pivotallyattached one end of an actuating rod or link 74, the latter providedwith guitlin sections 75 arranged between bearings 76 on frame ('33, andto each of said bars is coupled a spring 77 tending to move its bar in adirection to advance the jaw end of its lever toward the complementalmember of the clamp. The closing movement of the jaws under the actionof their springs is limited by block 70 with the opposite ends whereofsaid jaws contact in the absence of a matrix.

The front end of frame 63 i. 6., that nearest the chuck is fitted to abearing in a transversely movable slide 7 8 by means of which the jawcarrying frame 63 is caused to vibrate upon its pivot to bring said jawsalternately into register with the chuck, and upon the carriage 65 ismounted a lever 79 in position to engage either jaw actuating rod 74when brought into register therewith by the displacement of frame 63.Frame 63 is movable transversely of the axis of sleeve 16, its jawstraversing a path intermediate the chuck and centering spindle. l/Vhenin normal position, as represented in Fig. 19, the clamping jaws arewithdrawn from the chuck and elevated to bring the actuating rod 74 ofthe lower clamp in register with lever 79 to permit of the opening ofsaid clamp for the reception of a blank matrix; and when carriage ismoved to advance the clamps into the space between the chuck andcentering spindle, and slide 78 is actuated to bring either clamp intoregister with said chuck, the actuating rod 74 pertaining to the clampat the time opposite the chuck will be in register with lever 79 and inposition to be operated thereby to open the clamp for the reception ordelivery of a matrix.

To protect the clamps from the chips given off by the millin cutters thelatter are separated from the former by a casing attached to or formedin part by the frame and provided with an opening 80 for the passage ofthe clamp frame 63, and in said opening is arranged a self closing door81 which yields to the advance of said frame and permits the passing toand fro of the clamps.

Suitably supported upon the frame to the left of the clamp frame 63 is aremovable supply galley 90 the open end whereof abuts against a block 91and registers with an opening 92 therein through which the matricespass, the end of the column being arrested by a wall 93, forming oneside of a trans verse channel 94 terminating at one side of the openingthrough which the clamp frame reciprocates. A follower 95, traveling ona guide and connected to a weight 96 through cord 97, the latter passingaround properly disposed pulleys, serves to advance the column ofmatrices as the front member in channel 94 is removed.

The receiving galley is suitably supported on the right of frame 63 withits open end in register with a gate or passage 98 containing retainingsprings 99 and opening into a transverse channel or way 100 terminatingat one end in the opening or passage for the clamp frame 63 and providedwith a spring retaining pawl 101.

The floors of channels 94, 100, are on clifferent levels separated thedistance between the two sets of jaws of the translating devices so thatwhen frame 63 is shifted to position the jaws in the space betweenproximate ends of said channels, the upper jaws will register withchannel 100 and the lower with channel 94 as indicated in Fig. 34, inwhich position lever 79 registers with the actuating rod 74 of the lowerclamp as in Fig. 22, and operating thereon opens the clamps for theadmission of a matrix. The

104 reciprocating in ways on the frame and is formed or provided withtwo engaging faces the lower (105) riding in channel 94 and the upper(106) at the end of a reduced extension adapted to pass between the jawsof the upper clamp and advance the matrix into channel 100, beyondretaining pawl 101. Pusher 103, Fig. 40, is carried by a slide 106supported to reciprocate transversely of slide 104 in guides on theframe and operates across the rear end of channel 100 in line with theentrance to the receiving galley. Opposite the shorter lower sect-ion ofpusher 102 is an abutment 107 serving to gage the posit-ion of thematrix when introduced into the lower clamp.

)Vith the exception of the means for rotating the milling cuttershereinbefore described, the several mechanisms receive their motionsfrom a single cam shaft 108, coupled with pulley 14 through gears 108",shaft 109, and worm gearing 110, Figs. 1, 2 and 4, as follows: Themilling cutter carriage 6 is connected by link 111 with a lever 112, thelatter bearing a roller engaging grooved cam 113 (Figs. 3 and 48); theactuating rod 24 is advanced to open chuck jaw 19 by the engagement ofa. lever 114 (Fig. 5) whose lower arm carries a roller in contact withcam 115, Fig. 46; the centering pin spindle actuating lever 37, Fig. 5,is acted upon in a direction to advance said spindle by a spring 117 andin opposition thereto by a cam 118, Fig. 44; the locking bolt 42 and Islide 60 of the translating devices are coupled together and connectedbya link 119 to a lever 120, the latter moved in one direction by aspring 121, Fig. 5, and in the opposite direction by a cam 122, Fig. 45;rack 62 of the translating devices is oscillated by a link 124 connectedto a lever 125 engaged by cam 126, Fig. 47; slide 78 for effecting thevertical movements of clamp frame 63 of the translating devices isconnected by link 127 to lever 128 the latter controlled by cam 129,Fig. 43; carriage 65 of the translating devices is coupled with a cam130, Fig. 41, through a lever 131, opposed springs 132 on link 133, rack134, segment 135, shaft 136, segment 137 and rack 138, the latter onsaid carriage; lever 79 for opening the clamps of the translatingdevices is coupled with cam. 139, Fig. 41, through a shoe 140, Figs. 19,20' and 21, riding on rod 141, carried by piv-

